SOPRA 4897 is an SBS-modified bitumen venting base sheet for use in approved multiply membrane and flashing assemblies. SOPRA 4897 is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with a high quality random glass fiber mat. The topside is surfaced with fine mineral aggregate while the underside is surfaced with mineral granules to facilitate venting characteristics.
- Component Base
- Installation Method Mechanically Attached
- Reinforcement Glass Fiber
- Thickness 120 mils (3.1 mm)
- Topside Sanded
- Underside Sanded
Prior to installation, unroll SOPRA 4897 onto the roof surface and allow to relax. Position SOPRA 4897 in desired position and fasten to nailable substrate. Subsequent approved inter-ply or cap ply membranes are applied to SOPRA 4897 via cold adhesive or heat welding. Refer to the SOPREMA SBS Roofing Guide for additional application guidelines.
Testing & Approvals
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Riviere Saint-Etienne Bridge – Saint Denis, France
City: Saint Denis
Country: Reunion Island (Bourbon Island) - France
Product used: ANTIROCK® P quickly implemented on asphalt with the use of 2 new generation of Mini-Macaden® - Upstands : Flashing® TP
Fourth Avenue Junior High School – Yuma, Arizona
The building that the Fourth Avenue Junior High resides in was built in 1920 and was named a National Historic Landmark in 1982. When the building required a re-cover roof project, its National Historic Landmark status and student safety was top priority. Due to its history and age, care needed to be taken when completing the project. The products installed were required to be odor-less and could not damage the building. A second requirement for the project was that it be completed quickly and without lingering odors, because they planned to complete the installation over their holiday break. This is where SOPREMA products came into play.